<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>首页</title>
    <script src="https://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js"></script>
</head>
<body>
<body>

<div class="middle">

    <div class="login_div">
        <div class="change_div">
            <div class="con_bottom">
                <div id="code">
                    <div class="code_div">
                    </div>
                </div>
            </div>
        </div>
    </div>
</div>

</body>
</body>
</html>